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Age	Commit message (Collapse)	Author	Files	Lines
2024-11-11	asm-generic: ticket-lock: Reuse arch_spinlock_t of qspinlock	Guo Ren	1	-10/+2
	The arch_spinlock_t of qspinlock has contained the atomic_t val, which satisfies the ticket-lock requirement. Thus, unify the arch_spinlock_t into qspinlock_types.h. This is the preparation for the next combo spinlock. Reviewed-by: Leonardo Bras <leobras@redhat.com> Suggested-by: Arnd Bergmann <arnd@arndb.de> Link: https://lore.kernel.org/linux-riscv/CAK8P3a2rnz9mQqhN6-e0CGUUv9rntRELFdxt_weiD7FxH7fkfQ@mail.gmail.com/ Signed-off-by: Guo Ren <guoren@kernel.org> Signed-off-by: Guo Ren <guoren@linux.alibaba.com> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Reviewed-by: Andrew Jones <ajones@ventanamicro.com> Reviewed-by: Andrea Parri <parri.andrea@gmail.com> Link: https://lore.kernel.org/r/20241103145153.105097-10-alexghiti@rivosinc.com Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
2022-05-11	asm-generic: ticket-lock: New generic ticket-based spinlock	Peter Zijlstra	1	-0/+17
	This is a simple, fair spinlock. Specifically it doesn't have all the subtle memory model dependencies that qspinlock has, which makes it more suitable for simple systems as it is more likely to be correct. It is implemented entirely in terms of standard atomics and thus works fine without any arch-specific code. This replaces the existing asm-generic/spinlock.h, which just errored out on SMP systems. Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Tested-by: Heiko Stuebner <heiko@sntech.de> Reviewed-by: Guo Ren <guoren@kernel.org> Reviewed-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>